The high crag of Craig Yr Aderyn / Bird's Rock in west Wales,
rising from sea level to over 250 m, is a striking landscape
feature on the south side of the Dysynni valley near Tywyn. The SPA
comprises rocky crags, acid grassland, heath and Bracken
Pteridium aquilinum. The site is of European importance as
a traditional breeding and roosting site for Chough Pyrrhocorax
pyrrhocorax, which are present throughout the year.
Non-breeding birds roost during the summer and traditionally there
are high numbers outside the breeding season. The maintenance of a
short grassy sward, which provides an important feeding area for
Chough, is considered one of the factors influencing the number of
breeding and roosting birds.